Powering down Sheoldred The Apocalypse EDH B4 to a B3

Im taking some cards out of my commander Sheoldred The Apocalypse EDH deck, and replacing them with slower/ weaker cards so I can power her down. Im doing this because at B4 I cant play her as much as I would like to and being my favorite deck I would like to play her as much as possible. Decklist: https://moxfield.com/decks/ZIghFGrXZE...